(a) JOA score
(b) VAS of lumbar pain
(c) VAS of limb pain
(d) ODI
Figure 2: Mean values of clinical outcomes at preoperative, 1 year after the surgery and final follow-up of (a) JOA score, (b) VAS of lumbar pain, (c) VAS of limb pain, and (d) ODI. JOA, Japanese Orthopedic Association; VAS, Visual Analog Scale; ODI, Oswestry Disability Index.